功率分流式混动汽车发动机转矩故障诊断及容错控制

The fault diagnosis and fault-tolerance strategy of engine torque for power-split HEV

发动机转矩不足、不出转矩等发动机转矩故障可造成车辆驱动能力急剧恶化,有必要对其实施诊断并妥善处理。针对功率分流式混合动力汽车,提出基于行星齿轮转矩平衡数学模型的诊断方法,并提出了分级容错控制策略,最后对诊断及容错控制策略进行了仿真验证。结果表明,该控制策略能够在预期的时间内诊断出故障,并能够进行妥善处理。

Aiming at the engine torque failure such as torque insufficiency which always causes rapid power deterioration,it introduces the fault diagnosis based on torque balance mathematic model of planetary gear,presents a hierarchical fault-tolerant control strategy,simulates the diagnosis and fault-tolerant control strategies.The results verify that the control strategy can diagnose the fault in the expected time and deal with it properly.